KR200205981Y1 - Non-return valve with closing shock protector - Google Patents

Abstract

According to the present invention, one end of the link is fixed to the outer end of the shaft on which the valve disk which allows the flow of fluid in one direction inside the sealed body is fixed, and the other end of the link is hinged to the shaft, and the shaft slides on the lower end. It is hinged to the main body by mounting the oil filled inside, and is mounted so as to slide through the inner side of the hollow hollow cylindrical body closed, as well as the slide body is equipped with a piston ring on the outer circumferential surface and inclined surface inside the lower end in the longitudinal direction A plurality of one-way air through holes and a plurality of two-way air through holes having a relatively smaller diameter than the one-way air through holes, wherein the outer diameter of the central portion of the one-way air through holes is the inner diameter of the one-way air through hole. It is formed relatively smaller and the size of one-way air A larger “c” shaped stopper is mounted with the opening part formed with a plurality of stepped parts as the lower side, and the lower part has an airflow blocking disc formed with a cone-shaped fluid flow blocking disc that increases in diameter at the lower side so that the upper and lower moving parts can move up and down. It characterized in that it is provided, to provide a reverse flow prevention valve having a closing shock prevention device to slowly close the valve disk to generate a closing shock by the force of the fluid when preventing the reverse flow of the fluid in the pipe to remove the impact force.

Description

Non-return valve with closing shock protector

1 is a front view showing a part of the conventional check valve cut.

2 is a side view showing a part of the conventional check valve cut.

Figure 3 is a side view showing a non-return valve with a closed shock prevention device according to the present invention.

Figure 4 is a front view showing a non-return valve with a closed shock prevention device according to the present invention.

5 is a detailed cross-sectional view of the main portion of the device of the present invention.

6 is a cross-sectional view taken along the line A-A 'of FIG.

* Explanation of symbols for main parts of the drawings

10: main body 12: inlet

14 outlet 40: shaft

50: link 70: shock absorbing portion

80: slide body 83: one-way air through hole

84: two-way air through hole 90: airflow blocking disk

120: valve disc seat 122: valve disc

The present invention relates to a check valve for preventing a backflow to prevent the flow of the fluid in the reverse direction in the direction of conveying the fluid, and more specifically, to close the closing shock by the force of the fluid conveyed at the time of stopping the flow of the fluid in the pipe Backflow prevention valve with closing shock prevention device that prevents damage of components caused by closing shock of valve disk, thereby allowing smooth and continuous fluid backflow prevention by closing the generating valve disk slowly and removing the impact force. It is about.

In general, a check valve for preventing backflow is installed to prevent flow of the fluid in the reverse direction in which the fluid is transported when various fluids such as water, steam, gas and oil are transferred.

The conventional structure of such a check valve is schematically shown in FIGS. 1 and 2.

FIG. 1 is a front view showing a part of the check valve cut away, and FIG. 2 is a side view of the check valve partially cut away.

Check valve 100 has a closed body 110, the fluid inlet 112 is formed on one side of the body 110, the fluid outlet 114 is formed on the other side the fluid through the inlet 112 It is introduced into the main body 110 and is discharged to the outside of the main body 110 through the outlet 114.

The inlet 112 is formed to extend a proper length into the body 110, the inner end forms a smooth valve disk seat 120, the valve disk seat 120 is a valve disk ( 122). The valve disk 122 has an end portion of the disk holder 130 mounted on the outer center of the hinge pin 124, and the other end of the disk holder 130 is fixed to the shaft 140 by extending a predetermined length. do.

The shaft 140 is positioned to be perpendicular to the flow direction of the fluid and is rotatably mounted, and the rotational support is formed by the shaft fixing sleeve 150 extending inwardly from the main body 110. Both ends, that is, the outer surface portion of the main body 110, the cover 160 is mounted to prevent the outflow of the fluid.

In the conventional check valve 100 configured as described above, when the fluid flows in the direction of the arrow in the drawing, the valve disk 122 rotates in the counterclockwise direction of FIG. If the fluid is to flow in the opposite direction to the above, the valve disk 122 rotates in the clockwise direction of the drawing to contact the valve disk seat 120 so that the fluid inside the body 100 Through the inlet 112 is to not flow to the outside.

However, in the conventional check valve described above, the valve disc 122 is opened or closed rapidly by a fluid flowing in a high pressure state, and the impact thereof is considerable, which causes the valve disc seat 120 to be damaged by the impact force. There have been many cases where the reverse flow of the fluid is not properly performed, and there are also problems that cause the pump to fail by deforming the components.

The present invention has been made to solve the conventional problems as described above, the object is to slowly close the valve disk to generate a closing shock by the force of the fluid was delivered at the time of interruption of the fluid transfer in the pipe to thereby close the impact force The present invention provides a non-return valve having a closing shock prevention device which prevents damage of components caused by a closing shock of a valve disc, thereby enabling a smooth and continuous flow of a backflow prevention function.

As a technical means for achieving the above object, the present invention has a closed body, a fluid inlet is formed on one side of the body, a fluid outlet is formed on the other side, the inlet is a proper length into the body The disk holder, which extends to form a smooth valve disk seat at an inner end thereof and fixes the valve disk that can cover the valve disk seat, is fixed to an axis rotatably mounted on the main body to direct fluid flow in the main body in one direction. In the valve for preventing a flow back, the shaft is further extended to the outside of the main body is fixed to one end of the link having a predetermined length to the outer end, the other end of the link is hinged to the upper end of the shaft, the shaft is the lower end Mount the disc-shaped slide on the hinge and connect oil to the body. As well as being mounted so as to slide through the oil sealing part inside the hollow cylinder-shaped body which is filled and closed, the slide body has an outer diameter substantially the same as the inner diameter of the body, so that the piston ring is mounted on the outer circumferential surface and is longitudinally oriented. A plurality of one-way air through holes having inclined surfaces formed on the inner side of the lower end and a plurality of two-way air through holes having a smaller diameter than the one-way air through holes, and the outer diameter of the central portion is one direction as the one-way air through holes. Cone is formed smaller than the inner diameter of the air through hole, and the top of the one-way air through hole in the upper part is a "c" shaped stopper, which is mounted on the lower part of the opening with a plurality of steps, and the lower part increases in diameter to the lower part. Airflow blocking disk with fluid flow blocking disk By providing a non-return valve with a closed shock prevention device, characterized in that it is installed to move up and down.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 3 is a side view showing a non-return valve in accordance with the present invention, Figure 4 is a front view showing a non-return valve in accordance with the present invention.

The check valve 1 of the present invention is roughly similar in configuration to the conventional check valve 100 described above.

That is, the check valve 1 has a sealed body 10, the fluid inlet 12 is formed on one side of the body 10, the fluid outlet 14 is formed on the other side fluid is inlet 12 Through the main body 10 is introduced through and discharged to the outside of the main body 10 through the discharge port (14).

The inlet 12 extends a proper length into the main body 10, and an inner end thereof forms a smooth valve disk seat 120 as shown in FIGS. 1 and 2. The valve disc seat 120 may be covered by the valve disc 122. The valve disk 122 has an end portion of the disk holder 130 mounted on the outer center of the hinge pin 124, and the other end of the disk holder 130 extends a predetermined length to be fixed to the shaft 40. do.

The shaft 140 is positioned so as to be perpendicular to the fluid flow direction and rotatably mounted, and the rotational support is formed by a shaft fixing sleeve 150 extending inwardly from the main body 10, and the shaft 40 of the shaft 40 Covers 160 and 61 are mounted at both ends, that is, outer surface portions of the main body 110, to prevent the outflow of the fluid.

The shaft 40 penetrates the one side cover 61 and is further extended to the outside of the main body 10, and one end of the link 50 having a predetermined length is fixed to an outer portion of the main body 10 of the shaft 40. One end of the weight arm 52 having a predetermined length is fixed. The other end of the link 50 is rotatably connected to the end of the shaft 72, and the other end of the weight arm 52 fixes a weight 54 having an appropriate weight.

The shaft 72 extends to the shock absorbing portion 70, which is a main part of the present invention, as shown in more detail in FIG.

The shock absorbing portion 70 has a substantially hollow cylindrical body body 71 of which the lower part is closed, one end of the rod-shaped connecting rod 18 is fixed to the lower surface of the body 71, the connecting rod 18 The other end of the) is rotatably mounted to the bracket 19 fixed to the outside of the main body (10). The upper end of the body 71 is formed in a flange shape to be closed by the disk-shaped cover 73, the cover 73 has a pipe (75) for oil injection, and also the pipe ( When the oil is injected into the body 71 through 75, a small hole 74 is formed through which air can pass to facilitate the injection, and the hole 74 can be opened and closed by the cover 74a. do. In addition, a through hole 76 is formed in the center of the cover 73, the shaft 72 is fitted into the through hole 76 so as to be slidable, and the fitting portion of the shaft 72 of the cover 73 is fitted. In the body 71, to form an oil sealing portion 77 for blocking the flow of oil outside.

At the end of the shaft 72 extending into the body 71, a disk-shaped slide body 80 having an appropriate thickness is mounted through the bolt member 81, and the slide body 80 has an outer diameter thereof. It is formed substantially the same as the inner diameter of the body 71, a plurality of piston ring 82 is mounted on the outer peripheral surface of the slide body (80). In addition, a plurality of one-way air through holes 83 penetrating in the longitudinal direction of the slide body 80 and a plurality of two-way air through holes 84 having a smaller diameter than the one-way air through holes 83 are formed. The air flow blocking disk 90 is mounted to the one-way air through hole 83. Of course, the quantity of the two-way air through hole 84 and the one-way air through hole 83 is not particularly limited, but the slide body (as shown in more detail in FIG. It is preferable to form a plurality of opposite to each other on the same radius apart from the center of the 80).

The air flow blocking disk 90 is formed such that the outer diameter of the central portion thereof is smaller than the inner diameter of the one-way air passage hole 83 so that air can flow through the gap, and protrude more than the slide body 80 at the upper end thereof. In addition, the “-” shaped stopper 92, which is larger than the size of the one-way air through-hole 83, is mounted as a bolt member with the lower side of the opening portion, and the lower portion is a cone-shaped fluid whose weight is increased to the lower side. A flow cut-off disk portion 94 is formed, and an inclined surface 86 whose inner diameter is further increased downward in accordance with the fluid flow-blocking disk portion 94 to form a lower portion of the one-way air through hole 83. . The lower end of the stopper 92 forms a plurality of stepped portions 93 (here, three).

Referring to the effect of the present invention made in this configuration as follows.

As shown in FIGS. 3 to 6, the check valve 1 having the closing shock prevention device according to the present invention has the same rough operation as that of the conventional check valve 100. That is, when the fluid is introduced into the main body 10 through the inlet 12, the valve disk 122 rotates in the counterclockwise direction of FIG. If the fluid is to flow in a direction opposite to the above, the fluid inside the body 10 by rotating the valve disk 122 in contact with the valve disk seat 120 in the clockwise direction of the drawing. Is to prevent the flow through the inlet 112 to the outside.

According to the present invention, when the fluid pushes the valve disk 122, the valve disk 122 is rotated upward to open the shaft, and the shaft 40 fixed to the valve disk 122 is the valve disk 122. Is rotated in the opening direction, so that the link 50 fixed to one end of the shaft 40 also rotates in the same direction as the shaft 40, and the other end of the link 50 is a shock absorbing part. The shaft 72 of 70 is raised. That is, when the fluid normally flows inside the body 10, the shaft 72 of the shock absorbing part 70 rises, and the slide body 80 fixed to the lower end of the shaft 72 is inside the body 71. Will rise from.

In addition, the body 71 is filled with oil previously injected through the pipe 75, and thus, when the slide 80 is raised, the body 71 is mounted in the one-way air through hole 83 of the slide 80. The air flow blocking disk 90 is lowered by the pressure of oil, and the lowering of the air flow blocking disk 90 separates the fluid flow blocking disk 94 and the inclined surface 86 to form a flow space of oil. In addition, the lower end of the stopper 92 is in contact with the upper surface of the slide body 80 to form an oil flow space between the step (93). Therefore, the oil inside the body 71 is a check valve because the flow is made very easily through the one-way air flow space 83 and the two-way air flow space 84, which are all opened when the slide agent 80 is raised The valve disc 122 of (1) is quickly opened to allow normal fluid flow at a fast time.

On the other hand, when the fluid flows in the opposite direction to the normal direction, when the fluid pushes the valve disc 122, the valve disc 122 rotates to the lower side to close the valve disc seat 120, and The shaft 40 fixed to the valve disk 122 rotates in the direction in which the valve disk 122 is closed so that the link 50 fixed to one end of the shaft 40 is also identical to the shaft 40. Direction, the other end of the link 50 raises the shaft 72 of the shock absorbing portion 70. That is, when the fluid flows inside the main body 10 in the opposite direction to the normal direction, the shaft 72 of the shock absorbing portion 70 descends, and the slide body 80 fixed to the lower end of the shaft 72 is Will be lowered inside the body (71).

That is, when the slide body 80 is lowered, the air flow blocking disk 90 mounted in the one-way air through hole 83 of the slide body 80 rises by the pressure of oil, and the air flow blocking disk ( Ascending of the 90 blocks the flow space of the oil by contacting the fluid flow blocking disk 94 and the inclined surface 86. Therefore, the oil inside the body 71 is opened in both directions when the slide 80 descends. Since the flow is made very difficult because it flows through the slide body 80 only through the air flow space 84, the valve disc 122 of the check valve 1 slowly rotates toward the valve disc seat 120. When the valve disc seat 120 is closed, the shock generated when the valve disc 122 is closed is eliminated. On the other hand, the weight 54 is mounted on the end of the weight arm 52 of a certain length fixed to the shaft 40 is difficult to flow the oil flowing to the one-way air through hole 83 when the valve disc 122 is closed Therefore, a certain degree of closing load is applied to the shaft 40 so that the closing of the valve disc 122 is smoothly performed.

As described above, according to the non-return valve having the closing shock prevention device according to the present invention, the valve disk which generates the closing shock by the force of the transferred fluid at the time of stopping the fluid transfer in the pipe is slowly closed to remove the impact force. By doing so, it is possible to prevent the breakage of the components due to the closing shock of the valve disc, thereby having a good practical effect that enables a smooth and continuous fluid backflow prevention action.

Claims (1)

It has a sealed body, the fluid inlet 12 is formed on one side of the body, the fluid outlet 14 is formed on the other side, the inlet is formed to extend the proper length into the body is smooth at the inner end of the valve disk A disk holder 130 forming a seat (Valve Disk Seat) 120 and fixing the valve disk 122 that can cover the valve disk seat 120 is fixed to an axis rotatably mounted to the main body so that the main body is fixed. In the non-return valve for enabling the flow of the fluid in one direction, the shaft 40 is further extended to the outside of the main body 10 so that one end of the link 50 having a predetermined length is fixed to the outer end thereof, The other end of the link 50 is hinged to the upper end of the shaft 72, the shaft 72 is hinged to the main body 10 by mounting a disc-shaped slide body 80 at the lower end and oil therein Is filled The slide body 80 is formed to be slidably penetrating through the oil sealing portion 77 inside the chained hollow hollow cylindrical body 71, and the outer diameter thereof is substantially the same as the inner diameter of the body 71. A plurality of one-way air through holes 83 and a plurality of one-way air through holes 83 having a piston ring 82 mounted on an outer circumferential surface and an inclined surface 86 formed inside the lower end in a longitudinal direction. Two-way air through-holes 84 are formed, and the one-way air through-hole 83 has an outer diameter at the center thereof smaller than the inner diameter of the one-way air through-hole 83 and a one-way air through-hole 83 at the upper end thereof. A stopper 92 having a larger size than the size of) is mounted on the lower side of the opening, which forms a plurality of stepped portions 93, and the lower portion of the cone-shaped fluid flow blocking device increases in diameter to the lower side. Back flow prevention valve with a closed shock prevention device, characterized in that the air flow is cut off the disk 94 is formed so that the disk 90 is moved up and down.